No… but only in a casual sense. Any terrestrial survey effectively has its own prime meridian because the difference between the local survey’s anchor meridian and Greenwich meridian is not known to sufficient accuracy… and may not even have precisely the same orientation in space even accounting for the time difference.quadibloc wrote:Despite the prime meridians of Paris and Ferro and even Washington D.C. going by the boards, and most of the world having an international agreement on accepting the Greenwich meridian, is there any place on Earth still using another one?
I am not aware of any countries remaining that use 0° to mean anything but the Greenwich meridian. Wikipedia’s article on prime meridian states, “The most widely used modern meridian is the IERS Reference Meridian,” but fails to document any examples of others in modern usage. I have never heard of any others, nor find any mentioned anywhere.
— daan